Rider University Athletics

2020-21
- Earned All-East honors and a bronze medal at the ECAC Championships as a member of the 4x800 relay team that posted a time of 9:05.78, fourth-fastest in program history.
- Earned a bronze medal at the MAAC Outdoor Championships as a member of the 4x800 relay team.
- Finished eighth in the 1,500-meters at the MAAC Outdoor Championships with a time of 4:46.24.
- Finished 30^th at the MAAC Cross Country Championships with a time of 23:24.7
- Ran a collegiate-best 2:19.91 in the 800-meters at the Rider 5-way.
- Ran a collegiate-best 4:39.35 in the 1,500-meters at the Monmouth Spring Invitational, sixth-best in program history.
- Ran a season-best 20:10.1 in the 5K at the Jasper Invitational.
- Member of the MAAC All-Academic team.

2019-20
- MAAC All-Academic Team and Academic Honor Roll recipient
- Part of the gold-medal-winning DMR team (12:01.76) at MAAC Indoor Championships
- Qualified for ECAC Championships with the DMR team
- Took first with the DMR team (12:29.72), while also taking sixth in the mile (5:22.24) at the Spartan Invite
- Finished third with the 4x800 team (9:22.90) at the Boston University John Thomas Terrier Classic
- PR’d in the 1000 (3:05.52) at the NYC Gotham Cup
- Ran her season-best 6K cross country time (23:09.0) at NCAA Division I Mid-Atlantic Championships
- Set a 5K PR (20:09.8) at the Henry Mercer Monmouth University Cross Country Invitational

2018-19
- Named to the MAAC All-Academic team.
- Finished 17th in the mile-run at the MAAC Indoor Championships.
- Ran a college-best time of 5:18.33 in the mile-run at the John Thomas Terrier Classic.

2017-18
- Her top 6K time of the cross country season of 26:01.0 came at the Rider XC Invite.
- Ran a time of 26:05.8 at the MAAC Cross Country Championships.

2016-17
- In her first collegiate race, ran a 23:08.7 in the 6k at Lehigh's Paul Short Run.
- Ran a 23:31.5 in the 6k at the 2016 MAAC Cross Country Championships.
- Ran a season-best mile time of 5:25.60 at the MAAC Indoor Championships.
- Her fastest time in the 800 during the outdoor season (2:21.08) came at the Widener Invitational.
- Was part of the 4x800 relay that finished seventh at the MAAC Outdoor Championships.
- Has the ninth-fastest time in the 1,500m in Rider history with a time of 4:43.12.

Before Rider
Four-year letter winner for cross country at Holy Cross High School…team won the 2014 XC State Championship…All-State…District Champion…three-time state medalist…four-year letter winner for track, competing in the 800, 1600 and 3200…two-time District Champion in the 1600 and 3200…two-time state medalist in the 1600, 3200 and 4x800 relay…named Outstanding Athlete and Runner of the Year…Honor Society…Student Council…Immaculate Heart of Mary honors program.

Personal
Majoring in biology…hobbies include lifeguarding and swimming...daughter of John and Marianne Greenfield, younger brother John, younger sister Samantha.

Mackenzie Greenfield TFRRS bio -> https://www.tfrrs.org/athletes/5960565/Rider/Mackenzie_Greenfield.html